7.3 Importing Potential-Field Images

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This menu allows you to convert tab or space delimited ASCII text files into Noddy format .grv or .mag geophysics files. These files must represent evenly spaced rectangular gravity or TMI sample points. This is useful if:

  1. You want to use Noddy for contouring or other display of raw geophysical data, or
  2. You want to use Noddy to calculate the 1st or 2nd vertical derivatives of some data or
  3. You want to create a reference dataset.

GROUP

NAME

FUNCTION

Image Dimensions

Num of Rows

Number of rows (Y direction) of data points in image

 

Num of Columns

Number of columns (X direction) of data points in image

Image Type

 

Select data type of image (gravity or magnetics)

Registration

Cell Size

Dimensions of cells in metres

 

Easting

Eastings of South West corner of Image

 

Northing

Northings of South West corner of Image

Field

Inclination

Inclination of Earth's magnetic field in area of survey

 

Declination

Declination of Earth's magnetic field in area of survey

 

Intensity

Intensity of Earth's magnetic field in area of survey

 

Altitude

Altitude of survey